and steve osunsami is covering it from the courthouse. >> what about the stabbing of your son, nick? i'm sorry that i have to ask that, sir. do you need a minute? >> of course, not. >> reporter: in this crowded georgia courtroom, there were more tears tuesday, this time from the ex-husband of karmen smith, the flight attendant police say waseem daker strong med in -- strangled in 1995. he said he had an argument with his ex-wife the morning of her murder. but said he had nothing to do with the attack. >> mr. smith, did you have anything to do with the murder of karmen smith? >> absolutely not. >> reporter: police say daker stabbed her son 18 times. in some wicked twist of revenge against loretta blatz. >> i don't know why you would threaten me. you know you threatened me. and i don't appreciate it. >> maybe you're scared of me. but that you always think i'm going to kill you. i know things to worry about better than you. >> reporter: on tuesday, daker's first full day presenting his defense, jurors heard from his witnesses for the first time. the owners of the paintball group say it